Chaeles l



(No Model.)

C. L. RIDDER.

EXHAUST MUPPLE. No.,330,242. Patented Nov. l0, 1885.

N Firms. Plwm-Linwgnmr. wnnlngum D4 c UNITED STATES PATENT OEEICE.

CHARLES L. KIDDER, OF NEV BRUNSWICK, NEW JERSEY, ASSIGNOR TO BERGMANN 8UCO., OF NEW YORK, N. Y.

EXHAUST-MUFFLE.

SPECIFICATION forming part of Letters Patent No. 330,242, dated Novemberl0, 1885.

Application filed May 8, 1885. Serial No. 164,778.

T0 all whom, it may concern:

Beit known that I, CHARLES L. KIDDER, of New Brunswick, in the county ofMiddle sex and State of New Jersey, have invented a certain new anduseful Improvement in Exhaust-Mufes for Steam-Engines, ofwhich thefollowing is a specification.

The object of my invention is to muffie the exhaust of asteam-engine-that is to say, to do away with the noise and the vibrationof the exhaust-pipe due to the emission of the exhaust-steam in shortand violent jets as the valve opens and closes the exhaust port. Theprinciple of operation of the devices heretofore employed for thispurpose has been to break up the jets of steam into small quantities,which pass through the pipe with less violence than the powerful jetswhich issue from the engine. The apparatus necessary for this iscomplicated and expensive.

I make use of a different method, which is carried into effect by meansof very simple and inexpensive devices.

This method consists in transforming the separate jets after they leavethe engine into a continuous iow of steam, which passes graduallythrough the exhaust-pipe without causing it to vibrate and withoutmaking any noise. I accomplish this by the use of a compressionchamberinto which the steam passes from the exhaust-port, and is compressed byits own force into an elastic cushion of vapor, while from such chamberthere isa communication with the exhaust pipe or staclgt'hrough whichsuch accumulated va por passes in a steady flow, not affected by theintermittent passage of the steam into the chamber.

l The accompanying drawing is a view, principally in section, of anapparatus embodying my invention.

A is a suitable chamber, which is divided (No model.)

longitudinally by a partition, c, into two passages, Z) c. Passage bisconnected at d with the exhaust-port of the engine, and passage c at cwith the exhaust-pipe, which extends to the stack or out into the air.The chamber A with its partition is preferably cast in one piece ofiron.

B is the compression-chamber, which may be a piece of wrought-iron pipeclosed at its upper end,f, and having a flange, g, at its lower end, bywhich it is secured to flange b on the open end of chamber A.

The operation of this apparatus is as follows, the arrows indicating thedirection of the exhaust-steam: As the exhaust-port is opened, jets ofsteam pass through the passage c into the compression-chamber B and riseto the top thereof until the upper part of such chamber becomes iilledwith compressed steam. Such steam is then by its own tension graduallyand continuously forced out in a steady and continuous ow through thepassage c and into the exhaust-pipe. Thus there is a constant, easy,noiseless passage of the steam.instead of an intermittent succession ofviolent puffs.

In an exhaust-muffle for steam-engines, the combination of the chamberdivided bya partition into two passages, one of said passages beingconnected with the exhaust-port of the engine and the other with theexhaust pipe or stack, and the compression-chamber connected with bothsaid passages, substantially as set forth.

This specification signed and witnessed this 6th day of May, 1885.

CHARLES L. KIDDER.

Vitnesses:

A. W. KIDDER, E. C. ROWLAND.

lit lis hereby certied that Letters Patent No. 330,242, granted Novemberl0, 1885, upon the application of Charles L. Kidder, of New Brunswick,New Jersey, for an improvement in Exhaust Mndes)7 Was erroneously issuedto Bergmann St Go..I their heirs or assigns, that said Letters Patentshould have been issued to Bcrgmcmn' Company, its successors or assignsand that the grant of said Letters Patent should be read With thiscorrection therein that the saine may conform to the record of the easein the Patent Office. i

Signed, countersigned, and sealed this 17 th day of November, A.. D.1885. I

H. L. MULDROW, Acting Secretary of thc latcrioi.

[SEAL] Gountersigned M. V. MONTGOMERY,

Commissioner of Patents.

